| 301 | Vanguard Petroleum Corp. | | Gas Operator | Jun 1986 |
| 302 | Velandera Energy Partners LLC | | Oil & Gas Operator | Nov 2024 |
| 303 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 304 | Viking Resources | | Oil & Gas Operator | Sep 1995 |
| 305 | Vista Investments | | Gas Operator | Nov 1998 |
| 306 | W M Smith | | Oil Operator | Jun 1989 |
| 307 | W&T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2026 |
| 308 | W. D. Roberson | | Gas Operator | Mar 2021 |
| 309 | W. J. Wegman, Jr. | | Gas Operator | Dec 1991 |
| 310 | Walker Energy, LLC | | Oil & Gas Operator | Nov 2024 |
| 311 | Watchtower Petroleum, LLC | | Oil & Gas Operator | Jun 2025 |
| 312 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | May 2026 |
| 313 | Wells-Battelstein O&G, Inc. | | Gas Operator | Dec 1986 |
| 314 | White Operating Co., L.L.C. | | Oil & Gas Operator | Oct 2019 |
| 315 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | May 2026 |
| 316 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | May 2026 |
| 317 | Windsor Gas Corporation | | Oil & Gas Operator | Aug 1989 |
| 318 | Womack & Nelson | | Gas Operator | Feb 1987 |
| 319 | Woods & Deas | | Oil & Gas Operator | Jan 1984 |
| 320 | Woods Operating Co., Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2020 |
| 321 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 322 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2026 |
| 323 | Zadeck Energy Group, Inc. | | Oil & Gas Operator | Dec 2011 |